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http://dx.doi.org/10.5000/EESK.2020.24.2.095

Rocking Stiffness of Electrical Cabinet for In-Cabinet Response Spectrum  

Chung, Yon Ha (Department of Civil and Environmental Engineering, Kookmin University)
Hong, Kee-Jeung (Department of Civil and Environmental Engineering, Kookmin University)
Cho, Sung Gook (Innose Tech)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.24, no.2, 2020 , pp. 95-102 More about this Journal
Abstract
Electrical instruments and devices contained in cabinets for controlling nuclear power plants require seismic qualification; likewise, in-cabinet response spectrum (ICRS) is necessary. Gupta et al. (1999) suggested the Ritz method, where rocking, frame bending, and plate bending behaviors of cabinets are considered, as a method for determining ICRS. This research proposes a method to determine the rocking stiffness of cabinets, which represents its rocking behavior. The cabinet is fixed on mounting frames and is connected to the base concrete by anchors. When horizontal excitation is applied to the cabinet, the mounting frames at anchors are locally deformed, the mounting frames are bent, and then rocking in the cabinet becomes evident. A method to determine equivalent vertical spring stiffness representing the local deformation of the mounting frames at anchors is then proposed. Subsequently, the rocking stiffness of this mounting frame is calculated upon assumption of the mounting frame as an indeterminate beam.
Keywords
Electric cabinet; In-cabinet response spectrum; Ritz method; Rocking stiffness; Mounting frame; Local deformation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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